"In an era when few women knew how to write, Hildegard of Bingen, the "Sibyl of Rhein", produced major works of theology and visionary writings. Bishops, popes, and kings came to consult with her. She used the curative properties of natural objects and wrote treatises on natural history and the medicinal usages of plants, animals, trees, and rocks. She founded a convent where her musical compositions where played. The Book of Divine Works is illustrated with miniatures representing man and the universe.'In the roundness of the human head one finds the roundness of the firmament. The just and rigorous dimensions of the firmament correspond to the same dimensions in the head of man.' (IV, 15-16). This illustration represents the divine love of the son of God. The fires of love and judgement burn in his chest, marking the exterior limits of the universe, in which man takes his place as the crowning glory of Creation."